Tap WaterIndex

← Montana

Tap water quality report

Hinsdale Water Department

EPA monitoring tested this supplier for 73 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
15
detected
250
people served
27
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Local government
Counties served
Valley

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

27
health-based violations
118
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2025-11-11
TT Health-based Unaddressed 2025-11-11
TT Health-based Resolved 2017-12-30
TT Health-based Resolved 2017-12-30
TT Health-based Resolved 2017-12-30
MCL Health-based Resolved 2015-10-01 → 2015-10-31
MCL Health-based Resolved 2015-10-01 → 2015-10-31
MCL Health-based Resolved 2015-10-01 → 2015-10-31
MCL Health-based Resolved 2015-10-01 → 2015-10-31
MCL Health-based Resolved 2014-09-01 → 2014-09-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
1243 µg/L 96%
of the EPA limit 1300 µg/L
worst single sample: 1300 µg/L
20/20 SYR4 2012–2019
Nitrate-Nitrite
850 µg/L 8.5%
of the EPA limit 10000 µg/L
 14/14 SYR4 2012–2019
Lead
0.0290 mg/L 193%
above the EPA limit of 0.0150 mg/L
 13/13 LCR 2025
Lead
10 µg/L 67%
of the EPA limit 15 µg/L
 13/20 SYR4 2012–2019
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 1/3 SYR4 2013–2019
Bromoform
0.8600 µg/L
No EPA limit set
 1/5 SYR4 2013–2019
Chromium
6 µg/L 6%
of the EPA limit 100 µg/L
 1/1 SYR4 2013
Combined Radium (-226 And -228)
1.3 pCi/L 26%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
Combined Uranium
12 µg/L 40%
of the EPA limit 30 µg/L
 1/1 SYR4 2016
Dibromoacetic Acid
3 µg/L
No EPA limit set
 1/2 SYR4 2014–2017
Dibromochloromethane
1.1 µg/L
No EPA limit set
 1/5 SYR4 2013–2019
Fluoride
400 µg/L 10%
of the EPA limit 4000 µg/L
 1/1 SYR4 2013
Selenium
7 µg/L 14%
of the EPA limit 50 µg/L
 1/1 SYR4 2013
TTHM
2.4 µg/L 3%
of the EPA limit 80 µg/L
 1/5 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
3 µg/L 5%
of the EPA limit 60 µg/L
 1/2 SYR4 2014–2017
58 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
JOHNSON, WAYNE
Phone
406-228-2433

Frequently asked questions about Hinsdale Water Department

Is Hinsdale Water Department tap water safe to drink?

EPA monitoring detected 15 contaminants in Hinsdale Water Department's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Hinsdale Water Department's water?

EPA monitoring detected Copper, Nitrate-Nitrite, Lead, Lead, Arsenic, and others. The full list with the level and data source for each is above.

How many people does Hinsdale Water Department serve?

Hinsdale Water Department reports serving 250 people in Montana, per its EPA record.

Has Hinsdale Water Department had any water quality violations?

The EPA has 118 violations on file for Hinsdale Water Department, of which 27 are health-based (a contaminant limit or required treatment was breached) and 2 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.